/**
 * Software License, Version 1.0
 * 
 * Copyright 2008 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgment:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgment may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or Granules, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called Granules, 
 * nor may Indiana University or Community Grids Lab or Granules appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 * LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 * WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 * NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 * INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 * INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 * "VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 * LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 * ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 * GENERATED USING SOFTWARE.
 */
package cgl.granules.scheduler;

import java.util.Properties;
import java.util.Random;

import cgl.granules.exception.CommunicationsException;
import cgl.granules.util.ParamsReader;
import cgl.granules.util.Version;
import cgl.narada.util.UUIDRetriever;

/**
 * This is a class which encapsulates the functionality of a computational
 * resource. In most cases, one instance of this class needs to run every
 * machine within the computational cloud.
 * 
 * @author Shrideep Pallickara
 * 
 */
public class Resource {

    private ExchangeProcessor exchangeProcessor;
    private Diagnostics diagnostics;
    private StreamingService streamingService;
    private UUIDRetriever retriever;


    /**
     * 
     * @param props
     *            The properties for streaming
     * @param commType
     *            The communications type
     * @param numOfThreads
     *            The maximum number of threads that should be spawned
     * @throws CommunicationsException
     *             If there are problems sending messages over the network
     */
    public Resource(Properties props, String commType, int numOfThreads)
        throws CommunicationsException {

        streamingService = StreamingService.getInstance();
        streamingService.initialize(null, new Random().nextInt(), props,
                                    commType);
        retriever = UUIDRetriever.getInstance();

        String deploymentStream = retriever.getRandomBasedUUIDAsString();
        diagnostics = new Diagnostics(deploymentStream, numOfThreads);
        exchangeProcessor =
            new ExchangeProcessor(diagnostics, deploymentStream, numOfThreads);
        exchangeProcessor.initialize();

        System.out.println("\n\tStarted " + Version.getVersion() + " Resource");
    }


    /**
     * @param args
     */
    public static void main(String[] args) {
        ParamsReader paramsReader = ParamsReader.getInstance();
        String configLocation = "config/ResourceConfig.txt";

        int numOfThreads = 4;
        if (args.length != 0) {
            configLocation = args[0];
        }

        try {
            Properties resourceProps =
                paramsReader.getProperties(configLocation);
            String commType = "niotcp";

            String transportProperty = "transport";
            if (resourceProps.containsKey(transportProperty)) {
                commType = resourceProps.getProperty(transportProperty);
            }

            String numOfThreadsProperty = "number-of-threads";
            if (resourceProps.containsKey(numOfThreadsProperty)) {
                numOfThreads =
                    Integer.parseInt(resourceProps.getProperty(numOfThreadsProperty));
            }

            Resource resource =
                new Resource(resourceProps, commType, numOfThreads);

        } catch (Exception e) {
            String report =
                "Encountered (" + e.getClass().getCanonicalName()
                    + ") exception: " + e.getMessage();
            System.out.println(report);
        }
    }
}
